Peptarium

Incretin signaling

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Retatrutide

Retatrutide

Incretin signaling

Retatrutide

Why it's interesting

An investigational triple agonist at GIP, GLP-1, and glucagon receptors.

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More about this

An investigational triple agonist at GIP, GLP-1, and glucagon receptors. Phase 3 weight results exist. It is not FDA-approved.

Agonist of. Established relationship. Human research.

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Incretin signaling

  • Established relationship. Approved-product pharmacology. Semaglutide is a GLP-1 receptor agonist. That is established pharmacology of the approved products, not a claim that every research vial matches them.

  • Established relationship. Approved-product pharmacology. Tirzepatide selectively binds and activates the GLP-1 receptor. It is a dual agonist, so this is only half of its labeled pharmacology.

  • Established relationship. Approved-product pharmacology. The same label describes tirzepatide as a dual GIP and GLP-1 receptor agonist that activates the GIP receptor.

  • Established relationship. Human research. Published trials describe retatrutide as a triple hormone-receptor agonist, including GLP-1. The trials are not an FDA approval.

  • Established relationship. Human research. GIP-receptor activity is part of that same triple-agonist description. Weight-loss results do not approve the drug.

  • Established relationship. Human research. Glucagon-receptor activity is the third named pharmacology. It does not mean the glucagon effect has a proven clinical benefit of its own.

Growth-hormone signaling

  • Established relationship. Review or regulatory summary. Sermorelin is GHRH(1–29) and stimulates pituitary growth-hormone release. Geref was discontinued. This is not a current approval.

  • Established relationship. Approved-product pharmacology. Tesamorelin is a growth hormone–releasing hormone analog. The approved use is visceral fat in HIV-associated lipodystrophy, not general fat loss.

  • Preliminary. Review or regulatory summary. Modified GRF(1–29) was designed around the GHRH receptor. The multi-day human GH studies used CJC-1295 with DAC, a different molecule.

  • Established relationship. Human research. Ipamorelin is a selective ghrelin-receptor agonist and raised growth hormone in human volunteers. The postoperative trial did not show a clinical benefit.

  • Preliminary. Review or regulatory summary. The blend name usually means CJC-1295 without DAC plus ipamorelin. There is no trial showing the pair is better than either peptide alone.

  • Preliminary. Review or regulatory summary. Ipamorelin is the second ingredient in that naming convention. Selling them together does not create one molecule or one proven effect.

  • Established relationship. Chemical or biochemical identity. LR3 is an IGF-1 receptor–binding analog with much weaker IGF-binding-protein affinity. Animal and cell work does not establish human muscle growth.

Melanocortin signaling

  • Established relationship. Approved-product pharmacology. Bremelanotide is a melanocortin receptor agonist. The labeled use is a specific sexual-desire disorder, not tanning and not athletic performance.

  • Supported, with limits. Human research. Melanotan II is a melanocortin analog. Small human studies reported tanning and erections. It is not an approved drug and not the same as Vyleesi.

Mitochondrial biology

  • Supported, with limits. Chemical or biochemical identity. Elamipretide is studied as a cardiolipin-binding peptide. The FDA approval is for muscle strength in Barth syndrome, not for longevity.

  • Established relationship. Chemical or biochemical identity. MOTS-c is encoded by a short open reading frame in mitochondrial DNA. That is its origin, not a treatment result.

  • Established relationship. Chemical or biochemical identity. NAD+ is a coenzyme in redox reactions. This edge is about the molecule’s normal biochemistry, not about infusion benefits.

Neurobiology

  • Preliminary. Animal research. BDNF and NGF messenger-RNA changes are laboratory and animal findings. They are not proof of cognitive enhancement or stroke recovery in routine care.

  • Preliminary. Animal research. Rat and cell experiments reported GABA-related gene changes. One Selank cytokine abstract also names Semax in a results sentence, so related Russian-literature claims need care. This is not a GABA-A drug.

Immune and inflammatory research

  • Supported, with limits. Human research. Human trials exist, including the TESTS sepsis trial. The corrected primary result did not show a significant mortality benefit. Hepatitis evidence is low or very low certainty.

  • Established relationship. Chemical or biochemical identity. KPV is Lys-Pro-Val, the C-terminal tripeptide of alpha-MSH. Derivation is not the same as copying the parent hormone’s effects.

  • Preliminary. Cell or tissue research. Inflammation experiments used cells, excised tissue, or animals. The FDA assessment did not identify human clinical trials of KPV.

Tissue, copper, and mixtures

  • Preliminary. Animal research. Tendon and vessel findings are largely preclinical. The 2026 human review covered three studies and 30 people, at very low certainty.

  • Established relationship. Chemical or biochemical identity. Doping-control chemistry identified TB-500 as acetyl-LKKTETQ. Full-length thymosin beta-4 eye trials do not belong to that fragment.

  • Supported, with limits. Review or regulatory summary. GHK-Cu binds copper. Human evidence is mainly small topical cosmetic studies, not injectable efficacy and not an FDA drug approval.

  • Preliminary. Review or regulatory summary. KLOW is marketed as a mixture that includes GHK-Cu. No controlled trial has tested the four-peptide blend.

  • Preliminary. Review or regulatory summary. BPC-157 is named as a second ingredient. Its own evidence does not transfer to the blend.

  • Preliminary. Review or regulatory summary. TB-500 is named as a third ingredient. Fragment and full-length thymosin beta-4 are still not interchangeable.

  • Preliminary. Review or regulatory summary. KPV is the fourth named ingredient. It lives in the immune cluster because that is where its own research sits.

  • Preliminary. Review or regulatory summary. The blend is BPC-157 plus a TB-500-labeled product. Two ingredients, not one molecule.

  • Preliminary. Animal research. A 2026 rat study of the pair found no added healing benefit. The paper did not publish a sequence for its TB-500 vial, so the fragment is not established for that experiment.

Longevity experiments

  • Preliminary. Cell or tissue research. Telomerase and telomere findings are from cultured cells, and a 2025 paper later needed a figure correction. Mouse mean lifespan did not increase in the cited experiment.

  • Established relationship. Chemical or biochemical identity. AOD-9604 is a synthetic fragment of human growth hormone, not a growth-hormone-releasing drug. The early metabolic paper was a rat experiment.

  • Supported, with limits. Human research. Oral human studies were done. The major obesity trial did not show statistically significant weight loss versus placebo. Rabbit joint injections are a different experiment.

35 supported relationships. Copper solid lines are established. Sage dashed lines are preliminary or uncertain. Same-shelf buttons are not direct links.